EP 0699445 A2 19960306 - Method for the production of microbubble-type ultrasonic contrast agent by surfactant
Title (en)
Method for the production of microbubble-type ultrasonic contrast agent by surfactant
Title (de)
Verfahren zur Herstellung eines Mikrobläschen-Ultraschallkontrastmittels mit einem Tensid
Title (fr)
Méthode pour préparer un agent de contraste pour échographie du type microbulles, à l'aide d'un tensio-actif
Publication
Application
Priority
JP 18349194 A 19940804
Abstract (en)
An imaging agent for ultrasound to be administered into a vein is provided. More specifically, an imaging agent for ultrasound containing microbubbles, which has a long-life and is stable within a human body even after is has passed through a lung, and a method for producing the same, are provided. A method for producing an imaging agent for ultrasound comprises a mixing step wherein a mixture of water, Sodium Stearate, Saponin and CaCl2 and gas are mixed by a homogenizer for forming bubbles, and a separation step wherein bubbles having a desired size are separated according to their buoyancy after the mixing step. The mixing step further includes two stages, i.e., a low speed mixing stage and a high speed mixing stage. In the low speed mixing stage, a shaft of the homogenizer is immersed into a solution containing a preset amount of Sodium Stearate, Saponin, and CaCl2, which is mixed at a low rotation speed for a given period of time and is then left for a given period. Then, such a process is repeated. In the high speed mixing stage, said solution is mixed for a given period at a high rotaion speed. After this 2-stage mixing step, the separation is performed by using a burette, thereby obtaining microbubbles of a desired size. <MATH>
IPC 1-7
IPC 8 full level
A61K 49/22 (2006.01)
CPC (source: EP US)
A61K 49/223 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0699445 A2 19960306; EP 0699445 A3 19960417; US 5876697 A 19990302; US 5985247 A 19991116
DOCDB simple family (application)
EP 95112095 A 19950801; US 2254898 A 19980212; US 50994295 A 19950801